Change installer package name to rhel-osp-installer

Change-Id: I15f99d97c28e0c59dc24473983e74785553ec57c
Updates to staypuft to support non-interactive installer

The non-interactive installer now works. This commit removes some of the
older staypuft mechanisms that are no longer needed. The rest is to
create the answer files, run the installer, then kick off the rest of
the virt hosts.

Change-Id: I54223555a262294a711d856b04d74eb92030cff1